The pilot storage unit was inaugurated on March 18th, 2019 by Minister og Education and Research, Tommy Ahlers.

The storage consists of a pile of insulated stones, heated to 600 degrees, powered by the surplus from wind turbines. After a couple of days, when energy is needed again, the heat is passed through a generator which generates electricity and the residual heat is fed to district heating.

Read more:

(In English)
SEAS-NVE, project description: http://energilager.nu/en/the-project/

(In Danish)
SEAS-NVE press release: https://www.seas-nve.dk/koncernen/presse/nyheder-og-pressemeddelelser/2016/PM-Energilager

Ingeniøren: https://ing.dk/artikel/energiselskab-tester-sten-energilager-skala-13000-224762

DR: https://www.dr.dk/nyheder/viden/klima/sten-er-missing-link-i-den-groenne-omstilling-kan-gemme-paa-sol-og-vind

TV2: http://nyheder.tv2.dk/samfund/2019-03-18-dansk-opfindelse-skal-loese-udfordringen-med-vindenergi-og-den-er-ganske-simpel

(Photo by Jesper Blæsild)